TDA4672 Datasheet, PDF (9/16 Pages) NXP Semiconductors – Picture Signal Improvement PSI circuit with enhanced peaking function

Philips Semiconductors
Picture Signal Improvement (PSI) circuit
with enhanced peaking function
Product specification
TDA4672
I²C-BUS FORMAT
S⁽¹⁾
SLAVE ADDRESS⁽²⁾
ACK⁽³⁾
SUBADDRESS⁽⁴⁾
ACK⁽³⁾
DATA⁽⁵⁾
P⁽⁶⁾
Notes
1. S = START condition.
2. SLAVE ADDRESS = 1000 100X.
3. ACK = acknowledge, generated by the slave.
4. SUBADDRESS = subaddress byte, see Table 1.
5. DATA = data byte, see Table 1.
6. P = STOP condition.
7. X = read/write control bit.
X = 0, order to write (the circuit is slave receiver).
X = 1, order to read (the circuit is slave transmitter).
If more than 1 byte of DATA is transmitted, then auto-increment of the subaddress is performed.
Table 1 I²C-bus transmission; see Table 2
FUNCTION SUBADDRESS
D7
D6
D5
Y delay/SC
00010000
0
SC5
0
Peaking and coring 00010001
COR PEAK LCF
DATA
D4
D3
D2
D1
D0
DL4
DL3
DL2
DL1
DL0
0 PCON3 PCON2 PCON1 PCON0
Table 2 Function of the bits
DATA
DL0
DL1
DL2
DL3
DL4
SC5
LCF
PEAK
COR
PCONx
FUNCTION
set delay in luminance channel
select sandcastle pulse voltage
set peaking frequency response
set peaking delay
set coring control
set peaking amplification
LOGIC 1
LOGIC 0
45 ns
0 ns
90 ns
0 ns
180 ns
0 ns
180 ns
0 ns
450 ns
0 ns
+5 V
+12 V
2.6 MHz
5.0 MHz
active (190 ns)
inactive
active
inactive
see Table 3
1996 Dec 11
9